My first attempt at modifying the WGH layout was to add a double main line and have already found myself in too deep? Example is in photo of the same parallel Kato track. Showing the turnout going outside vs. turnout running inside? Does one have a double "S" ? I've been advised that the cars will d...

HO Scale: Kato Unitrack - Highly recommended - partially invested now with 29 unusable 490mm curves Marklin - I have no knowledge of this brand since none of the shops that I frequent carry it here in Los Angeles. We are running the WGH layout and now we want to expand on it to accommodate modern er...